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    Turning Cutting Forces Calculator - Optimize Machining Efficiency | WIDIA

    Cutting Forces, Torque, and Horsepower for Turning Applications

    These calculations are based upon theoretical values and are only intended for planning purposes. Actual results will vary. No responsibility from Kennametal is assumed.

    Skip this step if you already know the Brinell hardness number(HB)
    Metric
    Inch

    Skip this step if you already know the Brinell hardness number(HB)

    Skip this step if you already know the Brinell hardness number(HB)
    Characteristics of Workpiece Materials

    Characteristics of Workpiece Materials

    in mm
    HB
    Workpiece"p" Values (hp/in.3/min) for machining conditions:"p" Values (kW/cm3/min) for machining conditions:
    Type of materialDesignationCalculate HardnessFinishingRoughingGeneralFinishingRoughingGeneral
    Carbon steelAISI 10181410.700.660.620.033220.030940.02867
    Carbon steelAISI 10451950.740.700.720.034580.031400.03276
    Alloy steelAISI 41401940.790.740.730.037770.033220.03367
    Alloy steelAISI 43402140.760.720.730.038220.033220.03367
    Alloy steelAISI 41402580.850.770.790.040040.035040.03595
    Alloy steelAISI 41422770.840.770.750.040500.035040.03595
    Alloy steelAISI 43404851.311.001.050.059610.046870.04869
    Tool steelAISI H112050.780.730.760.038220.033670.03504
    Stainless steelAISI 316L1470.810.730.730.038220.031850.03322
    Stainless steelAISI 4102430.810.710.740.038680.033670.03413
    Stainless steelAISI 17-4 PH2940.990.700.720.045510.033670.03458
    Gray cast ironSAE G30001950.530.480.470.027300.021840.02184
    Ductile cast ironASTM 65-45-121650.580.550.510.030030.023660.02366
    Titanium alloyAMS Ti-6Al-4V2870.640.620.620.030940.027760.02867
    Nickel alloyInconel 7182771.201.011.021.059610.045960.04733
    Aluminum alloysAMS 20241390.310.290.300.015470.013200.01365
    hp/ln.3/min. kW/cm3/min
    Machining Conditions

    Machining Conditions

    inmm
    inmm
    ipr.mm/rev
    sfm.m/min
    Direct Belt Drive.9
    Back Gear Drive.75
    Geared Head Drive.7-.8
    Oil - Hydraulic Drive.6-.9
    Calculated Machining Conditions

    Calculated Machining Conditions

    rpm1/min
    ln.3/min.cm3/min
    min
    Cutting Forces Calculation

    Cutting Forces Calculation

    lbN
    lbN
    lbN
    lbN
    Horse Power Calculation

    Horse Power Calculation

    hpKW
    hpKW
    ft. lbs.N-m
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